Service difficulty report · Bearing · Grob G120A

Difficulty date
May 12, 2003
Submitted
May 28, 2003
Operation
General aviation
Aircraft
N865AF
Make and model
Grob G120A
Aircraft serial
85005
Part
Bearing
Condition
Failed
Location
Rudder
Part time
723 hours
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

DURING INSPECTION OF AIRCRAFT, FOUND BEARING TO BE FAILING. RETAINING CLIP AND SEAL WERE BEING FORCED OUT OF BEARING. PROBABLE CAUSE IS A DESIGN FLAW IN THE CONTROL SYSTEM WHICH ALLOWS THE CONTROL SYSTEM WHICH ALLOWS HE CONTROL ROD DEFLECTION TO EXCEED THE DESIGN LIMIT OF THE BEARING. RECOMMEND A DESIGN CHANGE OR REPLACE BEARING WITH ONE THAT HAS BETTER LIMITS AND LOAD HANDLING CAPABILITIES.

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